cmd/dfuse: fix(?) Glob used to list a directory from ?* to *.
cmd/dfuse: fix(?) Glob used to list a directory from ?* to *.

The old version was to avoid a problem with the old gcpdir.  It
apparently makes the current one not work...

Change-Id: I5a1a5d41d618201ea62414534e85d10c79230049
Reviewed-on: https://upspin-review.git.corp.google.com/1740
Reviewed-by: David Presotto <516b9783fca517eecbd1d064da2d165310b19759@google.com>

upspin/upspin,upspin/upspin